Electrical connections
30 - EN TTF300 CI/TTF300-EN
4.6.1.8 Flameproof enclosure - Zone 0 / 1
Housing design: ATEX II 2G Ex d IIC T6
Transmitter design: ATEX II 1G Ex ia IIC T6
Ex area Zone 0 Ex area Zone 1 Safe area
BC
A00133
J
A
i
a
i
a
D
i
a
Fig. 24
A Sensor
B Transmitter in Ex d housing
C Supply isolator
D Interface for LCD indicator
The only way to achieve the “flameproof enclosure” type of protection is through the correct
installation of a specially certified cable gland with Ex d type of protection that is marked
accordingly.
The input for the supply isolator must have an [Ex ia] design.
As the user, it is your responsibility to ensure that sensor instrumentation meets the
requirements of applicable Ex standards. The sensor can be installed in Zone 1 or Zone 0. For
Zone 0, the circuit must be of the [Ex ia] design.
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